
the étale specializations \(w_i\rightsquigarrow w_j\)  (see [1]}) whenever \(W_i\ne W_j\) ;

the image \(H_{W_i}\)  (called the monodromy group of the stratum \(W_i\) ) of the natural monodromy representation \(\pi _1^{et}(W_i,w_i)\rightarrow \operatorname{Aut}_{mon}(E_{\mathcal {X},w_i})\)  whenever \(W_i=W_j\) .


